Set about 300 years after Era 1, the Wax and Wayne series is about the exploits of Waxillium Ladrian, a "wild-west Deputy" forced to move into the big city, and starts investigating kidnappings and robberies.

The Alloy of Law was initially conceived as one of several short stories Brandon wanted to set between the first and second main trilogies that eventually grew into a full novel, and then a series.[7] The Wax and Wayne series is a single four book series, however The Alloy of Law stands more-or-less alone while the rest are plotted together like a trilogy.[8]

The second trilogy will be set in the early computer age with 1980s technology and will follow a Terris woman and her brother.[9] The woman is planned as a computer programmer and Nicroburst.[10] Peter has described her as a "brown Terris geek girl", though he does point out that this could change by the time the series is actually being written.[11]

The third trilogy is going to be a space-opera with Allomancy powered faster-than-light technology.[15]Hoid will be a main character in this trilogy.[16] The Sleepless, or Dysian Aimians, will also have a major role in this trilogy.[17]

There may be two more currently untitled cosmere series written before this trilogy.[8]